Fig. 4 Healing CP_DUPPOINT error
Fig. 5 Healing CP_SELFINT error
Fig. 6 Healing CP_PLAN error
tolerance. In Fig. 6 vertex P 3 doesn't lie within the plane formed by P 1 , P 2 , P 4 .
Small deviations are most likely caused by measurement inaccuracies or floating
point errors. In this case a small adjustment of the vertices might heal the polygon.